• Title, Summary, Keyword: 최소매설깊이

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A Rate Dependent Plasticity Model under Cyclic Loading of Metals (주기하중을 받고 있는 금속의 시간의존적 소성 모델 비교)

  • Kim, Dongkeon;Dargush, Gary F.
    • Journal of the Korean Society for Advanced Composite Structures
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    • v.4 no.1
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    • pp.25-32
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    • 2013
  • In real world applications, the response of structures may be dependent on the rate of loading and thus can be affected by transient loading, especially when the rate of loading is significant. In such situations, the rate of loading may become a major issue to understand structures during earthquake excitation or under blast or high velocity impact. In some cases, the rate effect on structures under strong earthquake excitation cannot be ignored when attempting to understand inelastic behavior of structures. Many researchers developed the constitutive theories in cyclic plasticity and viscoplasticity. In this study, numerical simulation by cyclic visocoplasticity models is introduced and analyzed. Finally, the analytical results are compared with experimental results as a means to evaluate and verify the model.

Cover Requirements for Corrugated HDPE and PVC Pipes Used for Cross-drains in Highway Construction (고속도로 하부 횡단 배수시설로 사용되는 파형 플래스틱 관의 덮개 요건)

  • Kang, Junsuk;Davidson, James S.;Lim, Jeong-Hyeon;Kang, Young Jong
    • Journal of the Korean Society for Advanced Composite Structures
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    • v.4 no.1
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    • pp.15-24
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    • 2013
  • This project investigated the use of two types of thermoplastic pipes, High-Density Polyethylene (HDPE) and Poly-vinyl Chloride (PVC), as cross-drains under highways. Pipes ranging from 0.3 m (12 in.) to 1.5 m (60 in.) in diameter were evaluated under deep fills, minimum cover, and construction loads. In addition to a comprehensive literature review, an analytical study into the allowable fill heights for thermoplastic pipes and a field study to observe the installation and performance of the pipe in service conditions were conducted. Based on the study findings, recommendations regarding how and when thermoplastic pipe should be installed are provided.